Brick-press



UNITED vsTATEs i. PATENT oEEicE.

JOHN CHASE, JR., OF PEQUONOCK, CONNECTICUT.

BRICK-PRESS.

Speccation of Letters Patent No. 12,898, dated May `22, 1855.

To all 'whom'z't may concern:

Be it known that I, JOHN CHASE, Jr., of Pequonock, in the county of Hartford and State of Connecticut, have invented a new and Improved Machine for Manufacturing Bricks; and I do hereby declare that the following-is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specication, in which Figure 1, is a longitudinal vertical section of my improved machine, the plane of section being through the center (gh) (y) Fig. 2, shows the plane of section. Fig. 2, is a plan or top view of ditto. Fig. 3, is a horizontal section of ditto (w) Fig. 1 showing the plane of section.

Similar letters of reference indicate corresponding parts in the several figures.

The nature of my invention consists 1st inthe peculiar means employed for feeding the empty molds to the press in order to be` filled with the tempered clay and also for discharging the molds from the machine when lle My invention further consists in a pe-` culiar device for freeing the filled mold fromI stones as they are discharged from the press. This will be fully described hereafter.

To enable others skilled in the art to make and use my invention, I will proceed todescribe its construction and operation.

A, represents the frame of the machine of rectangular form. The upper part of the frame is inclosed forming a box or case A having within it the pug mill which will be hereafter described.

B, is a swinging frame formed of two bars (a) (a) which work on pivots (b) (b) attached one at each side of the frame A. Both ends of the bars (a) (a) are connected by transverse rods (c) (c) at the outer sides of the frame A. To the under side of each bar (a) there are two curved arms (d) (d) which project downward and meet at their lower ends and the lower ends of the arms of each bar-are connected by a transverse rod (e). The arms (d) (d) of each bar (a) are also connected by transverse rods (f) (f) at short distances above their points of junction.

C, C, Figs. l and 3, are two rods the inner ends of which are fitted loosely on the rod (e). The outer ends of these rods C, C,

are connected by pivots (g) to the upper ends of levers D, D, which are each profvided with a step like projection (la). The lower ends of the levers D, D, work on a shaft E, underneath a platform F, at one side of the lower part of the frame A, see Fig. 1.

Gr, Fig. 1, represents the bottom of the pug mill, and at each side or end of this bottom there is a chamber H, see Figs. 1

and 3, which form press boxes. The outer upassing through the ends of the bars.

On the outer sides of the grates I, there are placed friction rollers (j) (j) which are fitted in a frame M, which works in guides N, N, a guide projecting from the frame A, at each end of the grates. At the back of the frame M, there is a spring O. The friction rollers and frame are shown at one side only of the frame A.

P, represents a hollow shaft, the lower end of which rests upon the bottom Gr, of the box or case A at the upper part of the frame A. The upper end of the shaft P, works in a bearing (k) at the upper part of the frame A, and has a toothed wheel Q, attached to it above the bearing, see Fig. 1. The shaft P, is placed vertically in the box or case A', as clearly shown in Fig. -l.

R, is a shaft which passes through the hollow shaft P. The lower end of this shaft is stepped n a cross piece S, at the lower part of the frame A, and the upper part extends above the hollow shaft P, see Fig. 1.

T, Figs. 1 and 2 is a sweep which is placed loosely on the upper part of the hollow shaft P, and which is connected to the hollow shaft P, by a clutch U, see Fig. 1. At eachend of the sweep T, there are two gear wheels V, V, the lower one V, being smaller in diameter than the upper one V. The lower wheels V, gear into a stationary toothed wheel W, attached to the upper part of the frame A, and concentric with the wheel Q, and the upper wheels V, gear into the wheel Q on the hollow shaft P.

To the shaft P, are attached the usual sweeps X, and knives Y, two sweeps and one knife being shown.

Between the bars of the grates I, and at their lower ends there are placed levers or pendents (l) which hang loosely on a rod (mi) which extends the whole length of the grates, the upper ends of the levers or pendents are rounded and have projections at their outer sides, the edges of the projections being flush with the outer surfaces of the grate bars, see Fig. 3. The lower parts of the levers or pendents, or the parts below the rod (m) are considerably longer than the upper parts so that the projections (n) will be kept in a horizontal position by the gravity or weight of the lower parts las clearly shown in Fig. l.

On the lower part of the shaft R, there are two crank pins (r), one of which (p) works between the bars L, L, on the screw rods K, K, and the other (r) works between the rods of the swingingl frame B, see Figs. l and 3. j

Operation: The clay is thrown into the box or case A, and is properly moistened and the clutch U, is opened so as to disconnect the two shafts P, R. The sweep T,

is then rotated and the hollow shaft P, rotates and the clay is properly ground by the knives Y, any proper number being used. The shaft P, with its knives Y, and sweeps X, constitute what is commonly termed thepug mill and is precisely the same as those in general use. When the clay first put in the box or case A, is ground the clutch U, is connected and both shafts P, R, then rotate, the clay still being fed into the box or case A in suitable quantities. As the shaft R, rotates the crank pin (p) acts ,first against one of the bars L, and then the other and communicates a reciprocating motion to the followers J, and the clay in the chambers or press boxes H, is forced through the grates J, into the molds at their outer sides.

The molds are designated by B. The

I y crank pin (r) as the shaft R, rotates acts follower presses the clay into it.

*rod (c) is up the follower J, is drawn back and the follower is shoved forward and presses the clay into the mold between the bars of the grate I, and remains forward till the rod (c) has descended the rod ,(0) as it descends pressing an empty mold in between the friction rollers and grate I, and at the same time forcing down the filled mold which falls upon the step like projections (iz) of the levers D. The rod (c) remains down until the follower has been drawn back and then rises while the follower remains back, both the rod and follower having dwells or cessation of movement. Vhen the filled mold has dropped upon the projections (it) it is moved forward up/on the platform F, by the forward motion of the levers D, D, said movement being given the levers by the rods C, C, on the rod (e) which moves forward or toward the platform F, as the rod (c) ascends.

.The swinging frame B, operates alike on both sides of the frame A, one rod (c) ascending while the other descends, and there are two platforms F, one at each side of the frame A, although only one is represented as the operation is precisely similar, the molds being filled at both sides of the frame. VOne side only may be used if desired by closing one of the chambers or press boxes H.

The necessary dwells 7 or cessation of the movement of the rods (c) (c) and followers J, J, is to allow sufficient time to feed the empty molds to the press boxes and take away the filled molds. The cause of the dwells it will of course be seen is occasioned by the time required for the crank pins to pass around between the rods (f) (f) and bars L, L.

Any requisite pressure may be given the followers J, J, by bringing the bars L, L, nearer together or further apart by turning the screw rods K, K, by bringing the bars nearer together the length of the stroke of the followers and their pressure is increased and decreased when moved further apart.

When the lfilled molds are forced down from between the grates I, and pressure rollers (j) (j) the rojections (n) on the levers or pendents face or smooth off the superfluous clay from the face of the molds, the clay not offering sufficient resistance to the projections to move or turn the levers or pendents, but if a stone lodges in the molds and projects beyond their faces, the stone will offer sufficient resistance to the projections as to turn back the lower ends of the levers or pendents (Z) the proj ectionsy Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is-

1. The swinging frame B, constructed, arranged and operating substantially as herein shown for the purpose of feeding the empty molds to the press boxes, and discharging the filled molds therefrom.

2. I am aware that devices have been previously employed for preventing stones and hard substances from being pressed against and into the molds by alfording facilities for removing said stones and hard substances from the molds before the clay is pressed into them. I therefore confine myself specifically to the device herein shown JOHN CHASE, JR.

l/Vitnesses:

SOLOMON F. TRACY, HERMAs H. HoLooMB. 

